Add 'environment' package

This commit adds a new environment package that manages all calls to the
underlying operating system.

internal/component/component.go

@@ -3,6 +3,7 @@ package component
 
 import (
 	"github.com/FAU-CDI/wisski-distillery/internal/config"
+	"github.com/FAU-CDI/wisski-distillery/pkg/environment"
 )
 
 // Component represents a logical subsystem of the distillery.
@@ -38,7 +39,7 @@ type Installable interface {
 	// Stack can be used to gain access to the "docker compose" stack.
 	//
 	// This should internally call [ComponentBase.MakeStack]
-	Stack() StackWithResources
+	Stack(env environment.Environment) StackWithResources
 
 	// Context returns a new InstallationContext to be used during installation from the command line.
 	// Typically this should just pass through the parent, but might perform other tasks.
@@ -47,8 +48,14 @@ type Installable interface {
 
 // ComponentBase implements base functionality for a component
 type ComponentBase struct {
-	Dir    string         // Dir is the directory this component lives in
-	Config *config.Config // Config is the configuration of the underlying distillery
+	Core        // the core of the associated distillery
+	Dir  string // Dir is the directory this component lives in
+}
+
+// Core represents the core of a distillery
+type Core struct {
+	Environment environment.Environment // environment to use for reading / writing to and from the distillery
+	Config      *config.Config          // the configuration of the distillery
 }
 
 // Base returns a reference to the ComponentBase
@@ -67,7 +74,8 @@ func (ComponentBase) Context(parent InstallationContext) InstallationContext {
 }
 
 // MakeStack registers the Installable as a stack
-func (cb ComponentBase) MakeStack(stack StackWithResources) StackWithResources {
+func (cb ComponentBase) MakeStack(env environment.Environment, stack StackWithResources) StackWithResources {
+	stack.Env = env
 	stack.Dir = cb.Dir
 	return stack
 }